Nut-lock.



H. LANDUA:

NUT LOCK.

APPLICATION FILED SEPT-15.1913- 1,157,007. 4 Patented 0d. 19, 1915.

or sa s HENRY LANDUA, or KIEL, wrsooiv'snv.

NUT-LOCK.

To all whom-it may concern: 7

Be it known that I, HENRY LANDUA, a citizen of the United States, residing at Kiel, in the county of Manitowoc and State of WVisconsin, have invented a certain new and useful Improvement in Nut-Locks, of which the following is a full, clear, concise, and exact description, reference being-had to the accompanying drawings, forming a part of this specification.

M'y'invention relates to nut locks, and has for its object the provision of improved means for preventing a nut from becoming loose after having once been put in place upon a bolt. Generally speaking, the means which I provide are automatic in their nature and are so arranged that as the nut is being screwed into place upon the bolt, the means automatically revent the recoil of the nut, and thus finally hold the nut in position when it has reached its limiting position.

I will explain one form of carrying out my invention more in detail by referring to the accompanying drawing illustrating such embodiment, in which:

Figure 1 is a side view of a nut and bolt constructed in accordance with my invention; Fig. 2 is a top view thereof; Fig. 3 is an end View of the bolt, and Fig. 4 is a side view of a portion of the bolt.

My improved device is adapted for use upon a bolt 1, which bolt has at its end face a pluralityof serrations herein shown more or less in the form of a ratchet having teeth,

2, 2, four in number. It is of course obvious that there may be more-0r less teeth as the occasion may require. The nut 3 is provided with a pawl, herein shown in the shape of a spring pawl t which is fastened at 5 by having a projection 6 thereof forced into a hole provided therefor in the nut 3. This pawl of course tends to press toward Copies of this patent may be obtained for Specification of Letters lPatent,

' being secured PatentedaOot. 19, 1915.

Application filed September 15, 191 3. Serial No. 789,727.

the nut and when the boltprotrudes through the nut as shown in Fig. 1, the pawl rides over the'teeth 2 and falls into positionback of these teeth,thereby preventing the un- It will be seen that thedevice is of such a character that the locking feature is-automatic and furthermore the lock is positive and acts throughout quite a wide. range,=by

screwing of the nut. Y

which I mean that the nut may occupy a great many difierentlpositionsupon the bolt and still be locked in position. The great advantage of thus arranging the parts will be readily apparent, and it will also be apparent that many modifications may be made without departing from the invention defined by the appended claim.

' Having however thus set forth one form which my invention may take, what I claim asnew and desire to secure by Letters Patent is:

In a device of, the character described, a screw threaded bolt having, an end face provided with ratchet teeth in a plane at right angles to said bolt, a screw threaded nut adapted to encircle said bolt, and a spring arm extending spirally around the bolt in the direction of its length, said spring arm ing yieldable substantially from said fixed at one end to the nut and be-' end to the opposite free end thereof, which said free end is adapted to engage the surface of and pressagainst the ratchet teeth of the bolt whereby to prevent reverse-rotation of said nut.

In witness whereof, I hereunto subscribe my name this 27th day of August,A. D. 1913. v p

p p HENRY LANDUA.

Witnesses: r

OSEM A. A TER, JOHN OHLENIEH.

five cents each, by addressing the Commissioner of Patents,

Washington, D. G. v 

